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UNITED STATES PATENT OFFICE,

HERMANN JACOB FRIEDER-IGH NIEWERTH, OF HANOVER, PRUSSIA, GERMANY.

METALLIC ALLOY OR COMPOUND IN PRODUCING THE SAME.

SPECIFICATION forming part of Letters Patent No. 332,736, dated December 22, 1885.

Application filed December 8, 1884. Serial No. 149,776.

To all whom it may concern.-

Be it known that I, HERMANN JACOB FRIED- ERIOH N IEWERTH, a subject of the Emperor of Germany, and a resident of Hanover, in the Kingdom of Prussia and German Empire. have invented certain new and useful Improvements in Metallic Alloys or Compounds in Producing the Same, of which the following is a specification.

The objects of my improvements are the alloying of heavy metals with sulphurets of heavy metals by adding conveniently alkali metals or alkaline-earth metals and the products of such alloying processes.

To alloy a heavy metal or alloys of heavy metals with a sulphuret of a heavy metal, I dissolve the latter in molten zinc, thus producing an alloy of zinc with a sulphuret of another heavy metal. lVhen such alloys are molten together with other heavy metals, the products of such melting process will be alloys of great strength and resisting force and of very bright colors. The zinc may be easily removed from the alloys by cupellation. In some cases the dissolution of the sulphuret of the heavy metal in zinc may be entirely omitted, and the sulphuret dissolved directly in the heavy metal or the alloy of heavy metals.

When alkali metals or alkaline-earth metals are to be introduced in alloys of heavy metals and sulphurets of heavy metals, the sulphuret of the alkali metal or alkaline-earth metal desired is added in portions to the molten heavy metal or alloy of heavy metals. The reaction generated by such addition is a very vehement one. Therefore each dose of the sulphuret of the alkali metal or alkaline-earth metal introduced into the molten metal or alloy ought to be very small, as otherwise the whole mass contained in the furnace or the crucibles would be blown out. During the introduction of the sulphuret of the alkali metal (N0 specimens.)

or alkaline-earth metal into the molten heavy metal or alloy of heavy metals a decomposition of the sulphuret takes place, as its sulphur unites with apart of the heavy metal or metals,while the nascent alkali metal or alkalineearth metals enter in chemical combination with the heavy metal or metals, whereby all danger of destroying the alkali metals or alkaline-earth metals by combustion is prevented. The sulphuret of the heavy metal thus produced is entirely dissolved in the molten metal or alloy.

Having thus fully described my invention and thebest means Iknow to carry it out into practice, what I desire to claim and secure by Letters Patent is 1. The process of alloying heavy metals with the sulphurets of metals, which consists in first dissolving the sulphuret of the metal in molten zinc, then mixing the product with the heavy metals desired to form the alloy in their molten condition, and finally removing the zinc by cupellation, substantially as set forth.

2. The process of alloying heavy metals with the sulphurets of metals, which consists in adding to the heavy metals desired to form the alloy in theirmolten condition small quantities of the sulphuret of an alkaline metal, so that the decomposition of the said sulphuret takes place gradually, and the sulphur and nascent alkali are enabled to combine with the said heavy metals, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 20th day of November, 1884.

HERMANN JACOB FltlEDERlCll NIEWERTll.

Witnesses:

ALEXANDER SPEOHT, DIEDRIOH PETERSEN. 

